package com.itheima.reggie.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
//表示该类主要用于处理 HTTP 请求，并返回数据而不是视图。
@RestController
@RequestMapping("/employee")
public class EmployeeController {


    /**
     * 自动注入员工服务
     */
    @Autowired
    private EmployeeService employeeService;

    /**
     * 处理登录请求的方法
     *
     * @param request  HttpServletRequest 对象，用于获取请求相关的信息
     * @param employee 携带登录信息的员工对象，通过 @RequestBody 注解从请求体中获取并绑定
     * @return 返回一个 R<Employee> 对象，通常用于表示登录操作的结果
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {

        //1、将页面提交的密码password进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2、根据页面提交的用户名username查询数据库
        /*
         * 创建一个用于查询员工的 LambdaQueryWrapper 对象
         */
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<Employee>();
        /*
         * 设置查询条件，查找用户名与给定员工对象的用户名相等的员工记录
         * 通过 Employee::getUsername 这种函数式接口的方式来指定字段
         */
        queryWrapper.eq(Employee::getUsername, employee.getUsername());
        /*
         * 根据构建的查询条件获取一个匹配的员工对象
         */
        Employee emp = employeeService.getOne(queryWrapper);

        //3、如果没有查询到则返回登录失败结果
        if (emp == null) {
            return R.error("登录失败");
        }

        //4、密码比对，如果不一致则返回登录失败结果
        if (!password.equals(emp.getPassword())) {
            return R.error("登录失败");
        }

//        5、查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if(emp.getStatus() == 0) {
            return R.error("账号已禁用");
        }
//        6、登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee", emp.getId());


        return R.success(emp);
    }

    /**
     * 员工退出
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        //清理session中保存的当前员工id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }


    /**
     * 新增员工
     * @param request
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request,@RequestBody Employee employee) {
        log.info("员工信息{}",employee.toString());

        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());

        //获得当前用户的id
//        Long empId = (Long)request.getSession().getAttribute("employee");
//        BaseContext.setCurrentId(empId);
//        employee.setCreateUser(empId);
//        employee.setUpdateUser(empId);

        employeeService.save(employee);

        return R.success("新增员工成功");
    }


    /**
     * 员工信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        log.info("page={},pageSize={},name={}",page,pageSize,name);
        //构造分页构造器
        Page pageInfo = new Page(page,pageSize);
        //构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(!StringUtils.isEmpty(name),Employee::getUsername,name);
        //添加排序条件
        queryWrapper.orderByDesc(Employee::getCreateTime);

        //执行查询
        employeeService.page(pageInfo,queryWrapper);

        return R.success(pageInfo);
    }


    /**
     * 更新员工信息
     * @param request
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee) {
        log.info("员工信息{}",employee.toString());

//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(empId);
        employeeService.updateById(employee);
        return null;
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id) {
        log.info("根据id查询员工信息");
        Employee employee = employeeService.getById(id);
        return R.success(employee);

    }
}
